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ETHAN n'onENEY, or BOSTON, MASSACHUSETTS, AssieNon'TofHIMs'nt-r AND NAYLon & oo..

oF SAME-PLAGE.

Lmm Pam-r No. 102,910, aman@ 10,1370.

`m6cneduierefmeetolncnuomuenrant and makingpmtotthesame.

To all whom it may concern y Be it known that I, Enns R. Ummm', of Boston, iii the conty oi' Snolk and State of Massachusetts, have invented 'an Improved .Machine for Straightening Bar Metal, Snc.; and Ldo hereby declare that-the following, token in connect-ion with thel drawings which accompany and form part of this speciilcation, is a description of my invention sufficient to s enable those skilled in the art to practice it.

My invention relates to a method of straightening bnr iron or shapes against n stationary straight up' 'right anvil-or woll by the 'action of a. movable 'jaw or squeeze?.

My invention consists in o straightening machine having the movable jaw directlvconnected to the end of n piston-rod of n steam cylinder, having a valve worked by a hand-lever, to enter steam be hind the piston (to work u'p the jaw toward the staf 4tionaryanvil) or4 in front ofthe piston to work the .jaw back.

The drawings represent n mechanism embodying the invention. A

A shows the machine in plan'.

B is-an end elevation of it.

O is a section o n the line'sc as.

Disasectionontheline'yy. Y I

a denotes a table or bed, making part of nimmework, which moy be mounted .upon wheels c, so as to constitutea mrriage to be wheeled 'from ploee to place 4in n mill, a's circumstances may require At the front edge of the table a along wall or auf vil, d, extends up, as. seen at B, this 'constituting the stationery straight edge or snr'facea'gainst which by the action ot' a long movable straight-edge or pw, e, the bar is straightened, the bar being placed on the table a, between the face of the jaw e and the anvil d.

, The jaw c may restl directly upon and slide over the table o, but, for ease'of. movement, is preferably mounted upon wheels or fotionfrolls g.

Midway between its opposite ends the jaw is jointed to the end ota. pstou-rod,v1x or to n. link connecting therewith, as seen at i, this pistoni-rodl extending 'oma piston inn'steam cylinder,k, having a steam chest, I, and suitable inductioni and cdnof tion valve-openings and a cylindrical vaive, the valve being ,-uponHthe inner andi-of 'a valvestem, 1n, this -valre-stem--having xed upon ita"rocker-ann,

n, connected by a link, o, to a mind-lever; j, ful#` crumed, at one end, upon a. post, q, and workingat its ther end, through a 'suitable guide-slot, r, in' a." poss. i A Through the hed a; asiat, t, is eut, and vthrough this slot a pin eiteuds 'om thejaw e, (which i Y fpin may be the Joinbpin h5 sind; the jawgis titoli thepistorbrod, ns seen at 0,) and-on this pin is a collar 'or'washevtnbq u, having e ange, n?, which, extending beyond the sides of the siott, serves to hold the movable jaw downto the tabie,fa nuten -the lower 'or screw-threaded end'oi the pin holding the washer in platee, while the pin end washer guide the jaw in-ts movements, or preventlaterahniovenient of the har, which vwould tend to bend the'pis' ton-rod.. Y Y j v -Y The har swivels loosely 'upon-its joiutpiu, but is held normallyIt'u-aliei to the anvil fishy two slight 4 springs, w.

At the rear edge of the tabicarc suitable stops, zr, projecting np from the table,`these stops being pret'erably provided with springs or cushions y, the Ajaw e, in its rear movement, bringing np against these cushions. Y

The'operation of the machine is asxfoilows;

The bar ofirou, or other metal to be straightened, is placed upon the table a, against the wall.-

The lever p' is then raised to the vtop of the guide` slot lr, therebyA opening wide the valve behind the'V lpiston, letting in full pressure of steam, which' throws the piston forward, and with it theV movablejjaw, bringing the adjacent of thefjiw -c-andi anvil into juxtaposition, separated onlylbyjthe lthickf. ness of the' bar, from which,- by thefsqueezing he tweenthe two straight faces, all the-Ebends v'are'. in-

stantly removed, `the movable jaws'wiveling infanoordance with' the crooks or bends lin thebar :is the rions that the f jaw first strikes it, while it willzbe' b Y two faoes'mnst be brought into' al-jalielisni,if the bar be of uniform thickness, and.igtheypressnreof ator lets the Vlever p down-`slowly, thns.fvery=grad` nally opening the exhanstinfrear of the piston, and'A letting steam in at the front o fthe" piston,allons` ing t throw the piston slowly back, and' Vlet Compressed air, or other ex` Y course, be employedas Kth To insure Ythe slowing` z, Y the stress fof-xviii Vit notcarryvthe: interrato?.` forits bsckmclfon; nt by 1i @asparagine 'pi nm-1inninensoient-runY gmc: 1

- By this means the bar is prevented' from being arrested by stopsz, cushioned by springs y, all the thrown back accidentally or violently. parts being combined and arranged substantially as I claim a bar-straightening machine, having a stashown and described. tionary anvil, d, amovable jaw, c, (connected to and ETHAN R. CHENEY.

operated by the piston of asteam cylinder,) and a lever, p, for operating the valve of the cylinder, the Witnesses:V

jaw c being mounted uponrolls, and being guided by CEAS. F. CHENEY, the slotfr andA slot-pin, and havngjts rear movement J ENNIE A. CHENEY. 

